Diquat
Vixen Water System
Diquat is a herbicide used on potato crops and aquatic weeds.
10
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 6 ppb
The EWG Health Guideline of 6 ppb for diquat was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cataracts.
EPA Maximum Contaminant
Level (MCL): 20 ppb
The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-03-26 | 35457369001 | ND |
| 2019-03-26 | 35457369002 | ND |
| 2019-03-26 | 35457369001 | ND |
| 2019-03-26 | 35457369002 | ND |
| 2021-06-09 | 35640031001 | ND |
| 2022-02-21 | 35698852001EF | ND |
| 2022-02-21 | 35698852002EF | ND |
| 2022-02-21 | 35698852003EF | ND |
| 2022-05-03 | 35714819003 | ND |
| 2022-09-13 | 35747178001 | ND |